CN101470565B - Touch screen and display equipment - Google Patents

Touch screen and display equipment Download PDF

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Publication number
CN101470565B
CN101470565B CN2007103058288A CN200710305828A CN101470565B CN 101470565 B CN101470565 B CN 101470565B CN 2007103058288 A CN2007103058288 A CN 2007103058288A CN 200710305828 A CN200710305828 A CN 200710305828A CN 101470565 B CN101470565 B CN 101470565B
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China
Prior art keywords
carbon nano
screen
touch
tube
conductive layer
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CN2007103058288A
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CN101470565A (en
Inventor
姜开利
刘亮
范守善
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Tsinghua University
Hongfujin Precision Industry Shenzhen Co Ltd
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Tsinghua University
Hongfujin Precision Industry Shenzhen Co Ltd
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Application filed by Tsinghua University, Hongfujin Precision Industry Shenzhen Co Ltd filed Critical Tsinghua University
Priority to CN2007103058288A priority Critical patent/CN101470565B/en
Priority to US12/286,153 priority patent/US8325145B2/en
Priority to JP2008317371A priority patent/JP4695180B2/en
Priority to EP08254027A priority patent/EP2073109A3/en
Priority to KR1020080130290A priority patent/KR101210747B1/en
Publication of CN101470565A publication Critical patent/CN101470565A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/047Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires

Abstract

The invention relate to a touch screen, which comprises a first electrode plate and a second electrode plate, wherein the first electrode plate comprises a first substrate, a first conducting layer and at least two first electrodes, the second electrode plate is spaced from the first electrode plate, the second electrode plate comprises a second substrate, a second conducting layer and at least two second electrodes, wherein at least one of the first conducting layer and the second conducting layer comprises a plurality of carbon nano-tube strip shaped film structures which are parallel and separated, two ends of the electrode plate which is equipped with the carbon nano-tube strip shaped film structure bodies are correspondingly equipped with a plurality of electrodes respectively, two ends of each carbon nano-tube strip shaped film structure body are electrically connected with two opposite electrodes respectively, and each electrode is electrically connected with one end of at least one carbon nano-tube strip shaped film structure body. Further, the invention relates to a display device using the touch screen, and the display device comprises a touch screen and display equipment.

Description

Touch-screen and display device
Technical field
The present invention relates to a kind of touch-screen and use the display device of this touch-screen, relate in particular to a kind of based on carbon nano-tube touch-screen and use the display device of this touch-screen.
Background technology
In recent years, be accompanied by the high performance and the diversified development of various electronic equipments such as mobile phone and touch navigation system, the electronic equipment that the touch-screen of light transmission is installed in the front of display devices such as liquid crystal progressively increases.The user of such electronic equipment is by touch-screen, on one side the displaying contents of the display device that is positioned at the touch-screen back side is carried out visual confirmation, utilize modes such as finger or pen to push touch-screen on one side and operate.Thus, various functions that can operating electronic equipment.
Different according to the principle of work of touch-screen and transmission medium, existing touch-screen is divided into four types usually, is respectively resistance-type, capacitor induction type, infrared-type and surface acoustic wave type.Wherein being most widely used of resistive touch screen sees also document " Production of Transparent Conductive Films with Inserted SiO 2Anchor Layer, and Application to a Resistive Touch Panel " Kazuhiro Noda, Kohtaro Tanimura.Electronics and Communications in Japan, Part 2, Vol.84, P39-45 (2001).
Existing resistive touch screen generally comprises a upper substrate, and the lower surface of this upper substrate is formed with transparency conducting layer on; One infrabasal plate, the upper surface of this infrabasal plate is formed with transparency conducting layer; And a plurality of point-like spacers (Dot Spacer) are arranged between transparency conducting layer and the following transparency conducting layer.Wherein, transparency conducting layer and this time transparency conducting layer adopt indium tin oxide (Indium Tin Oxide, ITO) layer (calling the ITO layer in the following text) with conductive characteristic usually on this.When using finger or pen to push upper substrate, upper substrate is distorted, and makes the last transparency conducting layer at the place of pushing and following transparency conducting layer contact with each other.Upwards transparency conducting layer and following transparency conducting layer apply voltage successively respectively by external electronic circuit, touch screen controller is by measuring change in voltage on first conductive layer and the change in voltage on second conductive layer respectively, and carry out accurate Calculation, convert it to contact coordinate.Touch screen controller passes to central processing unit with digitized contact coordinate.Central processing unit sends command adapted thereto according to contact coordinate, and the various functions that start electronic equipment are switched, and shows by display controller control display device.
Yet the ITO layer adopts technology preparations such as ion beam sputtering or evaporation usually as transparency conducting layer, in the process of preparation, needs higher vacuum environment and need be heated to 200~300 ℃, therefore, makes that the preparation cost of ITO layer is higher.In addition, the ITO layer as transparency conducting layer have mechanical property good inadequately, be difficult to shortcomings such as bending and resistance skewness.In addition, ITO transparency in malaria can descend gradually.Thereby cause existing resistive touch screen and display device to exist durability good inadequately, shortcoming such as sensitivity is low, linearity and accuracy are relatively poor.
Therefore, necessaryly provide a kind of durability good, and highly sensitive, linearity and strong touch-screen and the display device of accuracy.
Summary of the invention
A kind of touch-screen, comprise: one first battery lead plate, this first battery lead plate comprises one first matrix, one first conductive layer and at least two first electrodes, this first conductive layer is arranged on the surface of this first matrix, and these at least two first electrodes are disposed on this first electrode plate surface respectively and are electrically connected along the two ends of first direction and with first conductive layer; And one second battery lead plate, this second battery lead plate and first battery lead plate are provided with at interval, this second battery lead plate comprises one second matrix, one second conductive layer and at least two second electrodes, this second conductive layer is arranged on the surface of this second matrix, and the surface that these at least two second electrodes are disposed on this second battery lead plate respectively is electrically connected along the two ends of second direction and with second conductive layer; Wherein, described first conductive layer comprises a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with at least one conductive layer in second conductive layer, the described battery lead plate two ends that are provided with a plurality of carbon nano-tube strip shape film structures bodies correspondence respectively are provided with a plurality of electrodes, the two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and described each electrode is electrically connected with an end of at least one carbon nano-tube strip shape film structures body.
A kind of display device that comprises described touch-screen, comprise: a touch-screen, this touch-screen comprises one first battery lead plate and one second battery lead plate, this first battery lead plate comprises one first matrix, one first conductive layer and at least two first electrodes, this first conductive layer is arranged on the surface of this first matrix, and the surface that these at least two first electrodes are disposed on this first battery lead plate respectively is electrically connected along the two ends of first direction and with first conductive layer; This second battery lead plate and first battery lead plate are provided with at interval, this second battery lead plate comprises one second matrix, one second conductive layer and at least two second electrodes, this second conductive layer is arranged on the surface of this second matrix, and the surface that these at least two second electrodes are disposed on this second battery lead plate respectively is electrically connected along the two ends of second direction and with second conductive layer; And a display device, this display device over against and near the second battery lead plate setting of above-mentioned touch-screen; Wherein, described first conductive layer comprises a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with at least one conductive layer in second conductive layer, the described battery lead plate two ends that are provided with a plurality of carbon nano-tube strip shape film structures bodies correspondence respectively are provided with a plurality of electrodes, the two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and described each electrode is electrically connected with an end of at least one carbon nano-tube strip shape film structures body.
Compared with prior art, touch-screen and display device that the technical program provides have the following advantages: one, because a plurality of carbon nano-tube strip shape film structures bodies in the transparency conducting layer are parallel and setting at interval, therefore, described transparency conducting layer has mechanical property preferably, thereby make above-mentioned transparency conducting layer have physical strength and toughness preferably, so, adopt above-mentioned carbon nano-tube strip shape film structures body producing transparent conductive layer, can improve the durability of touch-screen accordingly, and then improve the durability of the display device of using this touch-screen; They are two years old, parallel and the setting at interval of a plurality of carbon nano-tube strip shape film structures bodies in the above-mentioned transparency conducting layer, thereby making transparency conducting layer have uniform resistance distributes and light transmission, and described each electrode is electrically connected with an end of at least one carbon nano-tube strip shape film structures body, so can come more accurately to determine touch point position, thereby help the resolution and the degree of accuracy of the display device that improves touch-screen and use this touch-screen by the change in voltage between the detecting touch point place electrode.
Description of drawings
Fig. 1 is the perspective view of the technical program embodiment touch-screen.
Fig. 2 is the side-looking structural representation of the technical program embodiment touch-screen.
Fig. 3 is the stereoscan photograph of carbon nano-tube film in the technical program embodiment touch-screen.
Fig. 4 is the side-looking structural representation of the technical program embodiment display device.
Embodiment
Describe touch-screen and the display device that the technical program provides in detail below with reference to accompanying drawing.
See also Fig. 1 and Fig. 2, the technical program embodiment provides a kind of touch-screen 10, this touch-screen 10 comprise one first battery lead plate, 12, one second battery lead plates 14 and be arranged on first battery lead plate 12 and second battery lead plate 14 between a plurality of transparent point-like spacer 16.
This first battery lead plate 12 comprises one first matrix, 120, one first conductive layers 122 and at least two first electrodes 124.This first matrix 120 is a planar structure, and this first conductive layer 122 and at least two first electrodes 124 all are arranged on the lower surface of first matrix 120.These at least two first electrodes 124 are disposed on first conductive layer, 122 lower surfaces respectively and are electrically connected along the two ends of first direction and with first conductive layer 122.This second battery lead plate 14 comprises one second matrix, 140, one second conductive layers 142 and at least two second electrodes 144.This second matrix 140 is a planar structure, and this second conductive layer 142 and at least two second electrodes 144 all are arranged on the upper surface of second matrix 140.These at least two second electrodes 144 are disposed on second conductive layer, 142 upper surfaces respectively and are electrically connected along the two ends of second direction and with second conductive layer 142.This first direction is perpendicular to this second direction.Wherein, this first matrix 120 is transparent and film that have certain pliability or thin plate, and this second matrix 140 is a transparency carrier, and the material of this second matrix 140 may be selected to be hard material or flexible materials such as glass, quartz, adamas and plastics.Described second matrix 140 mainly plays a part to support.This first electrode 124 is metal, carbon nano-tube film or other conductive materials with the material of this second electrode 144.In the present embodiment, this first matrix 120 is a polyester film, and this second matrix 140 is a glass substrate, these at least two first electrodes 124 and the silver slurry layer of at least two second electrodes 144 for conduction.
Be appreciated that described electrode also can be arranged between described conductive layer and the described matrix or is arranged on the described matrix, and be electrically connected, be not limited to above-mentioned set-up mode with described conductive layer.As long as can make form the mode that is electrically connected between above-mentioned electrode and the conductive layer all should be in protection scope of the present invention.
Further, these second battery lead plate, 14 upper surface outer periphery are equipped with an insulation course 18.The first above-mentioned battery lead plate 12 is arranged on this insulation course 18, and first conductive layer 122 of this first battery lead plate 12 is over against second conductive layer, 142 settings of second battery lead plate 14.Above-mentioned a plurality of transparent point-like spacer 16 is arranged between described first conductive layer 122 and second conductive layer 142, and these a plurality of transparent point-like spacers 16 are intervally installed.Distance between first battery lead plate 12 and second battery lead plate 14 is 2~10 microns.This insulation course 18 all can adopt insulation transparent resin or other insulation transparent materials to make with transparent point-like spacer 16.Insulation course 18 is set makes win battery lead plate 14 and second battery lead plate, 12 electrical isolations with transparent point-like spacer 16.Be appreciated that when touch-screen 10 sizes hour, transparent point-like spacer 16 be selectable structure, need guarantee that first battery lead plate 14 and second battery lead plate, 12 electrical isolations get final product.
Described first conductive layer 122 comprises a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with at least one conductive layer in second conductive layer 142, the described battery lead plate two ends that are provided with a plurality of carbon nano-tube strip shape film structures bodies correspondence respectively are provided with a plurality of electrodes, the two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and described each electrode is electrically connected with an end of at least one carbon nano-tube strip shape film structures body.Described carbon nano-tube strip shape film structures body is one deck carbon nano-tube film, and this carbon nano-tube film comprises a plurality of carbon nano-tube that align.In addition, described carbon nano-tube strip shape film structures body also can be the multilayer carbon nanotube films of overlapping setting, each layer carbon nano-tube film comprises a plurality of carbon nano-tube that align, and the carbon nano-tube in the adjacent two-layer carbon nano-tube layer film is arranged or arranged along different directions along same direction.Described carbon nano-tube film further comprises a plurality of end to end carbon nano-tube bundle fragments, each carbon nano-tube bundle fragment has equal lengths and each carbon nano-tube bundle fragment is made of a plurality of carbon nano-tube bundles that are parallel to each other, and described a plurality of carbon nano-tube bundle fragments two ends interconnect by Van der Waals force.Combine closely by Van der Waals force between this adjacent carbon nano-tube bundle, this carbon nano-tube bundle comprises a plurality of equal in length and the carbon nano-tube that is arranged in parallel.Described carbon nano-tube can be in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes one or more.The width of described carbon nano-tube strip shape film structures body is 1 millimeter~10 centimetres.The thickness of described carbon nano-tube strip shape film structures body is 0.5 nanometer~100 micron.Spacing between the described carbon nano-tube strip shape film structures body is 5 nanometers~1 millimeter.
Among the technical program embodiment, described first conductive layer 122 and second conductive layer 142 include a plurality of parallel and carbon nano-tube strip shape film structures bodies that be provided with at interval, and the carbon nano-tube strip shape film structures body in carbon nano-tube strip shape film structures body and described second conductive layer is arranged in a crossed manner in described first conductive layer.Because described first conductive layer 122 is parallel with the carbon nano-tube strip shape film structures body in second conductive layer 142 and setting at interval, preferably, the parallel and spaced set of carbon nano-tube strip shape film structures body in described first conductive layer 122 and second conductive layer 142, thereby making described first conductive layer 122 and second conductive layer 142 have uniform resistance distributes and light transmission features, and an end of at least one the carbon nano-tube strip shape film structures body in described each electrode and the described conductive layer is electrically connected, so can come to determine more accurately touch point position by the change in voltage that reaches between detecting touch point place first electrode 142 between second electrode 144, thereby help improving the resolution and the accuracy rate of touch-screen 10.
In the present embodiment, the size of this carbon nano-tube strip shape film structures body can make according to the actual requirements.Adopt 4 inches the super in-line arrangement carbon nano pipe array of substrate grown in the present embodiment, the width of described carbon nano-tube strip shape film structures body is 1 millimeter~10 centimetres.The thickness of described carbon nano-tube strip shape film structures body is 0.5 nanometer~100 micron.Wherein, the carbon nano-tube in the carbon nano-tube strip shape film structures body can be one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes.The diameter of this Single Walled Carbon Nanotube is 0.5 nanometer~50 nanometers; The diameter of this double-walled carbon nano-tube is 1.0 nanometers~50 nanometers; The diameter of this multi-walled carbon nano-tubes is 1.5 nanometers~50 nanometers.
The preparation method of described first conductive layer 122 of the technical program embodiment and second conductive layer 142 mainly may further comprise the steps:
Step 1: provide a carbon nano pipe array to be formed at a substrate, preferably, this array is super in-line arrangement carbon nano pipe array.
The carbon nano-pipe array that the technical program embodiment provides is classified a kind of in single-wall carbon nanotube array, double-walled carbon nano-tube array and the array of multi-walled carbon nanotubes as.The preparation method of this carbon nano pipe array adopts chemical vapour deposition technique, its concrete steps comprise: a smooth substrate (a) is provided, this substrate can be selected P type or N type silicon base for use, or selects for use the silicon base that is formed with oxide layer, present embodiment to be preferably and adopt 4 inches silicon base; (b) evenly form a catalyst layer at substrate surface, this catalyst layer material can be selected one of alloy of iron (Fe), cobalt (Co), nickel (Ni) or its combination in any for use; (c) the above-mentioned substrate that is formed with catalyst layer was annealed in 700 ℃~900 ℃ air about 30 minutes~90 minutes; (d) substrate that will handle places reacting furnace, is heated to 500 ℃~740 ℃ under the blanket gas environment, feeds carbon-source gas then and reacts about 5 minutes~30 minutes, and growth obtains carbon nano pipe array, and it highly is about 100 microns.This carbon nano-pipe array is classified a plurality of pure nano-carbon tube arrays parallel to each other and that form perpendicular to the carbon nano-tube of substrate grown as.This carbon nano pipe array and above-mentioned area of base are basic identical.By above-mentioned control growth conditions, do not contain impurity substantially in this super in-line arrangement carbon nano pipe array, as agraphitic carbon or residual catalyst metal particles etc.
Carbon source gas can be selected the active hydrocarbons of chemical property hinge such as acetylene, ethene, methane for use in the present embodiment, and the preferred carbon source gas of present embodiment is acetylene; Blanket gas is nitrogen or inert gas, and the preferred blanket gas of present embodiment is an argon gas.
Be appreciated that the carbon nano pipe array that the technical program embodiment provides is not limited to above-mentioned preparation method, also can be graphite electrode Constant Electric Current arc discharge sedimentation, laser evaporation sedimentation or the like.
Step 2: adopt a stretching tool from carbon nano pipe array, to pull carbon nano-tube and obtain a carbon nano-tube film.
The preparation of this carbon nano-tube film specifically may further comprise the steps: (a) a plurality of carbon nano-tube segments of selected certain width from above-mentioned carbon nano pipe array, present embodiment are preferably and adopt the adhesive tape contact carbon nano pipe array with certain width to select a plurality of carbon nano-tube bundles of certain width; (b) be basically perpendicular to a plurality of these carbon nano-tube bundles of carbon nano pipe array direction of growth stretching with the certain speed edge, to form a continuous carbon nano-tube film.
In above-mentioned drawing process, these a plurality of carbon nano-tube bundles are when pulling force effect lower edge draw direction breaks away from substrate gradually, because Van der Waals force effect, should be drawn out continuously end to end with other carbon nano-tube bundles respectively by selected a plurality of carbon nano-tube bundles, thereby form a carbon nano-tube film.This carbon nano-tube film comprises a plurality of carbon nano-tube bundles that join end to end and align.The orientation of the carbon nano-tube in this carbon nano-tube strip film is basically parallel to the draw direction of carbon nano-tube film.
See also Fig. 3, this carbon nano-tube film is the carbon nano-tube film with certain width that a plurality of carbon nano-tube bundles of being arranged of preferred orient join end to end and form.The carbon nano-tube film of the preferred orientation that obtains of should directly stretching has better homogeneity than unordered carbon nano-tube film, and seal has more homogeneous thickness and has more uniform conductive performance.Directly the method for stretching acquisition carbon nano-tube film is simply quick simultaneously, the suitable industrial applications of carrying out.
In the present embodiment, the width of the size of the substrate that the width of described carbon nano-tube film and carbon nano pipe array are grown and the carbon nano-tube fragment of choosing is relevant, and the length of this carbon nano-tube film is not limit, and can make according to the actual requirements.When the carbon nano-tube in this carbon nano-tube film is in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the double-walled carbon nano-tube one or more.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer~50 nanometers.The diameter of described double-walled carbon nano-tube is 1.0 nanometers~50 nanometers.The diameter of described multi-walled carbon nano-tubes is 1.5 nanometers~50 nanometers.
Step 3: prepare a plurality of above-mentioned carbon nano-tube films, form a carbon nano-tube strip shape film structures body, this carbon nano-tube strip shape film structures body is parallel and at interval be laid on described first matrix 120 or second matrix, 140 surfaces, form described first conductive layer 122 and second conductive layer 142.
Described carbon nano-tube strip shape film structures body is a plurality of carbon nano-tube films of a carbon nano-tube film or overlapping setting.The arrangement mode of the carbon nano-tube in a plurality of carbon nano-tube films of described overlapping setting in the adjacent two layers carbon nano-tube book film is not limit, and can arrange along same direction, can arrange along different directions yet.Spacing between the described carbon nano-tube strip shape film structures body is 5 nanometers~1 millimeter, specifically can select according to the light transmission of touch-screen 10.
The two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and an end of at least one the carbon nano-tube strip shape film structures body in described each electrode and the described conductive layer is electrically connected.During the technical program is implemented, one end of a carbon nano-tube strip shape film structures body in described each first electrode 124 and described first conductive layer 122 is electrically connected, and an end of a carbon nano-tube strip shape film structures body in described each second electrode 144 and described second conductive layer 142 is electrically connected.The orientation of the carbon nano-tube strip shape film structures body in described first conductive layer 122 can depart from described first direction.Preferably, the parallel and setting at interval of the carbon nano-tube strip shape film structures body in described first conductive layer 122 along described first direction.The orientation of the carbon nano-tube strip shape film structures body in described second conductive layer 142 can depart from described second direction.Preferably, the parallel and setting at interval of the carbon nano-tube strip shape film structures body in described second conductive layer 142 along described second direction.Described first direction is perpendicular to described second direction.Described a plurality of first electrode 124 and described a plurality of second electrode 144 are block type electrode.Described a plurality of first electrode 124 is connected with external circuits by contact conductor (figure expression) with described a plurality of second electrodes 144.
In addition, described a plurality of carbon nano-tube film also can prepare by following steps: adopt a stretching tool to pull the carbon nano-tube film that carbon nano-tube obtains a large-size from carbon nano pipe array; This carbon nano-tube film is cut into a plurality of carbon nano-tube films that size dimension equates.
Be appreciated that, the preparation of the described carbon nano-tube film that the technical program embodiment provides is not limited to above-mentioned preparation method, also can prepare a carbon nano-tube film by rolled-on method, a plurality of carbon nano-tube in this carbon nano-tube film are arranged, are arranged or each homogeny arrangement along different directions along same direction.In addition, also can adopt the waddingization method to prepare a carbon nano-tube film, this carbon nano-tube film comprises the carbon nano-tube of a plurality of mutual windings.
Further, have different optical indexs and transmissivity owing to be provided with the zone of carbon nano-tube strip shape film structures body with the zone that the carbon nano-tube strip shape film structures body is not set, for making the vision difference minimum of touch-screen integral light-transmitting, can form a packed layer (figure does not show) in the gap between the carbon nano-tube strip shape film structures body, the material of this packed layer has refractive index and the transmissivity identical or approaching with the carbon nano-tube strip shape film structures body.
In addition, these first battery lead plate, 12 upper surfaces can be provided with a transparent protective film 126, and this transparent protective film 126 can be formed by materials such as silicon nitride, monox, phenylpropyl alcohol cyclobutane (BCB), polyester or acryl resins.This transparent protective film 126 also can adopt layer of surface cure process, smooth scratch resistant plastic layer, as polyethylene terephthalate (PET) film, is used to protect first battery lead plate 12, improves durability.This transparent protective film 126 also can be used for providing some other additional function, as reducing dazzle or reducing reflection.
In addition, selectively,, avoid producing mistake, a screen layer (figure expression) also can be set on the lower surface of second matrix 140 from the signal that touch-screen 10 sends for the electromagnetic interference (EMI) that reduces to produce by display device.This screen layer can be formed by transparent conductive materials such as indium tin oxide (ITO) film, antimony tin oxide (ATO) film, nickel gold thin film, silver-colored film or carbon nanotube layers.In the present embodiment, described screen layer comprises a carbon nano-tube film, and the arrangement mode of the carbon nano-tube in this carbon nano-tube film is not limit, and can be to align the arrangement mode that also can be other.In the present embodiment, the carbon nano-tube oriented arrangement in this screen layer.This carbon nano-tube film conduct is point electrical ground, plays the effect of shielding, thereby makes touch-screen 10 to work in glitch-free environment.
See also Fig. 4, the technical program embodiment also provides the display device 100 of the above-mentioned touch-screen 10 of a use, and it comprises an above-mentioned touch-screen 10 and a display device 20.This display device 20 over against and be provided with near second battery lead plate 14 of above-mentioned touch-screen 10.This touch-screen 10 can with the 20 preset distance settings at interval of this display device, also can be integrated on this display device 20.When this touch-screen 10 and these display device 20 integrated settings, can this touch-screen 10 be attached on this display device 20 by cementing agent.
The technical program display device 20 can be display devices such as LCD, Field Emission Display, plasma display, electroluminescent display, vacuum fluorescent display and cathode-ray tube (CRT).
Further, when on the lower surface of these touch-screen 10 second matrixes 140 screen layer 22 being set, can on this screen layer 22 surface away from second matrix 140 passivation layer 24 be set, this passivation layer 24 can be formed by materials such as silicon nitride, monox.This passivation layer 24 is provided with a positive gap 26 at interval of display device 20.This passivation layer 24 uses as dielectric layer, and protects this display device 20 to be unlikely owing to external force is excessive and damage.
In addition, this display device 100 further comprises a touch screen controller 30, a central processing unit 40 and a display device controller 50.Wherein, this touch screen controller 30, this central processing unit 40 and this display device controller 50 threes interconnect by circuit, and this touch screen controller 30 is electrically connected with this touch-screen 20, and this display device controller 50 connects this display device 20.This touch screen controller 30 is located the input of selection information by icon or menu position that touch objects such as finger 60 touch, and this information is passed to central processing unit 40.This central processing unit 40 shows by this this display device 20 of display controller 50 controls.
During use, timesharing applies 5V voltage between second electrode 144 between first electrode 124 in described first battery lead plate 12 and in described second battery lead plate 14.The user is the demonstration of the display device 20 that is provided with below touch-screen 10 of visual confirmation on one side, by touch objects 60 as finger or pen push touch-screen 10 first battery lead plates 12 and operate on one side.First matrix 120 bends in first battery lead plate 12, makes first conductive layer 122 of pushing place 70 contact with second conductive layer 142 of second battery lead plate 14 and forms conducting.Touch screen controller 30 by detection push between place's 70 described first electrodes 124 and between second electrode 144 change in voltage, and carry out accurate Calculation, convert it to contact coordinate.Touch screen controller 30 passes to central processing unit 40 with digitized contact coordinate.Central processing unit 40 sends command adapted thereto according to contact coordinate, and the various functions that start electronic equipment are switched, and shows by display controller 50 control display devices 20.
Compared with prior art, touch-screen and display unit that the technical program provides have the following advantages: one, because a plurality of carbon nano-tube strip shape film structures bodies in the transparency conducting layer are parallel and the interval arranges, therefore, described transparency conducting layer has preferably mechanical property, thereby so that above-mentioned transparency conducting layer has preferably mechanical strength and toughness, so, adopt above-mentioned carbon nano-tube strip shape film structures body producing transparent conductive layer, can improve accordingly the durability of touch-screen, and then improve the durability of the display unit of using this touch-screen; They are two years old, parallel and the interval setting of a plurality of carbon nano-tube strip shape film structures bodies in the above-mentioned transparency conducting layer, thereby so that having uniform resistance, transparency conducting layer distributes and light transmission, and an end of at least one the carbon nano-tube strip shape film structures body in described each electrode and its place transparency conducting layer is electrically connected, so can determine more accurately the position of touch point by the voltage change between the detecting touch point place electrode, thereby be conducive to resolution ratio and the accuracy of the display unit that improves touch-screen and use this touch-screen.
In addition, those skilled in the art also can do other and change in spirit of the present invention, and certainly these variations of doing according to spirit of the present invention all should be included in the present invention's scope required for protection.

Claims (24)

1. touch-screen comprises:
One first battery lead plate, this first battery lead plate comprises one first matrix, one first conductive layer and at least two first electrodes, this first conductive layer is arranged on the lower surface of this first matrix, and the lower surface that these at least two first electrodes are disposed on this first battery lead plate respectively is electrically connected along the two ends of first direction and with first conductive layer; And
One second battery lead plate, this second battery lead plate and first battery lead plate are provided with at interval, this second battery lead plate comprises one second matrix, one second conductive layer and at least two second electrodes, this second conductive layer is arranged on the upper surface of this second matrix, and the upper surface that these at least two second electrodes are disposed on this second battery lead plate respectively is electrically connected along the two ends of second direction and with second conductive layer;
It is characterized in that, described first conductive layer comprises a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with at least one conductive layer in second conductive layer, the described battery lead plate two ends that are provided with a plurality of carbon nano-tube strip shape film structures bodies correspondence respectively are provided with a plurality of electrodes, the two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and described each electrode only is electrically connected with an end of a carbon nano-tube strip shape film structures body.
2. touch-screen as claimed in claim 1 is characterized in that, described carbon nano-tube strip shape film structures body is one deck carbon nano-tube film, and this carbon nano-tube film comprises a plurality of carbon nano-tube that align.
3. touch-screen as claimed in claim 1, it is characterized in that, described carbon nano-tube strip shape film structures body is the multilayer carbon nanotube films of overlapping setting, each layer carbon nano-tube film comprises a plurality of carbon nano-tube that align, and the carbon nano-tube in the adjacent two-layer carbon nano-tube film is arranged or arranged along different directions along same direction.
4. as claim 2 or 3 described touch-screens, it is characterized in that, described carbon nano-tube film further comprises a plurality of end to end carbon nano-tube bundle fragments, each carbon nano-tube bundle fragment has equal lengths and each carbon nano-tube bundle fragment is made of a plurality of carbon nano-tube bundles that are parallel to each other, and described a plurality of carbon nano-tube bundle fragments two ends interconnect by Van der Waals force.
5. touch-screen as claimed in claim 4 is characterized in that, combines closely by Van der Waals force between the adjacent carbon nano-tube bundle, and each carbon nano-tube bundle comprises a plurality of equal in length and the carbon nano-tube that is arranged in parallel.
6. touch-screen as claimed in claim 5 is characterized in that described carbon nano-tube comprises one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes.
7. touch-screen as claimed in claim 5 is characterized in that, the diameter of described Single Walled Carbon Nanotube is 0.5 nanometer~50 nanometers, and the diameter of described double-walled carbon nano-tube is 1.0 nanometers~50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometers~50 nanometers.
8. touch-screen as claimed in claim 1 is characterized in that, the width of described carbon nano-tube strip shape film structures body is 1 millimeter~10 centimetres.
9. touch-screen as claimed in claim 1 is characterized in that: the thickness of described carbon nano-tube strip shape film structures body is 0.5 nanometer~100 micron.
10. touch-screen as claimed in claim 1 is characterized in that, the spacing between the described carbon nano-tube strip shape film structures body is 5 nanometers~1 millimeter.
11. touch-screen as claimed in claim 1, it is characterized in that, the lower surface that described at least two first electrodes are separately positioned on described first conductive layer is electrically connected along the two ends of first direction and with first conductive layer, and the upper surface that described at least two second electrodes are separately positioned on described second conductive layer is electrically connected along the two ends of second direction and with second conductive layer.
12. touch-screen as claimed in claim 1, it is characterized in that, described first conductive layer includes a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with second conductive layer, and the carbon nano-tube strip shape film structures body in carbon nano-tube strip shape film structures body in described first conductive layer and described second conductive layer is arranged in a crossed manner.
13. touch-screen as claimed in claim 12, it is characterized in that, carbon nano-tube strip shape film structures body in described first conductive layer is parallel and setting at interval along described first direction, and the carbon nano-tube strip shape film structures body in described second conductive layer is parallel and setting at interval along described second direction.
14., it is characterized in that described first direction is perpendicular to described second direction as claim 11 or 13 described touch-screens.
15. touch-screen as claimed in claim 1 is characterized in that, described touch-screen comprises that further an insulation course is arranged on this second battery lead plate upper surface periphery, and this first battery lead plate is arranged on this insulation course.
16. touch-screen as claimed in claim 15 is characterized in that, described touch-screen comprises that further a plurality of transparent point-like spacers are arranged between this first battery lead plate and this second battery lead plate.
17. touch-screen as claimed in claim 16 is characterized in that, these a plurality of transparent point-like spacers are arranged between described first conductive layer and second conductive layer.
18. touch-screen as claimed in claim 1, it is characterized in that, described touch-screen further comprises a screen layer, and this screen layer is arranged on the lower surface of this touch-screen second matrix, and this screen layer is indium and tin oxide film, antimony tin oxide film or carbon nano-tube film.
19. touch-screen as claimed in claim 1; it is characterized in that; described touch-screen further comprises a transparent protective film; this transparent protective film is arranged on this first battery lead plate upper surface, and the material of this transparent protective film is silicon nitride, monox, phenylpropyl alcohol cyclobutane, polyester, acryl resin or polyethylene terephthalate.
20. a display device comprises:
One touch-screen, this touch-screen comprises one first battery lead plate and one second battery lead plate, this first battery lead plate comprises one first matrix, one first conductive layer and at least two first electrodes, this first conductive layer is arranged on the lower surface of this first matrix, and the lower surface that these at least two first electrodes are disposed on this first battery lead plate respectively is electrically connected along the two ends of first direction and with first conductive layer; This second battery lead plate and first battery lead plate are provided with at interval, this second battery lead plate comprises one second matrix, one second conductive layer and at least two second electrodes, this second conductive layer is arranged on the upper surface of this second matrix, and the upper surface that these at least two second electrodes are disposed on this second battery lead plate respectively is electrically connected along the two ends of second direction and with second conductive layer; And
One display device, this display device over against and near the second battery lead plate setting of above-mentioned touch screen; It is characterized in that: described first conductive layer comprises a plurality of carbon nano-tube strip shape film structures bodies parallel and that be provided with at interval with at least one conductive layer in second conductive layer, the described battery lead plate two ends that are provided with a plurality of carbon nano-tube strip shape film structures bodies correspondence respectively are provided with a plurality of electrodes, the two ends of described each carbon nano-tube strip shape film structures body are electrically connected with two electrode of opposite respectively, and described each electrode only is electrically connected with an end of a carbon nano-tube strip shape film structures body.
21. display device as claimed in claim 20, it is characterized in that, described display device further comprises a touch screen controller, a central processing unit and a display device controller, wherein, this touch screen controller, this central processing unit and this display device controller three interconnect by circuit, this touch screen controller is electrically connected with this touch-screen, and this display device controller is electrically connected with this display device.
22. display device as claimed in claim 20 is characterized in that, described display device is a kind of in LCD, Field Emission Display, plasma display, electroluminescent display, vacuum fluorescent display and the cathode-ray tube display.
23. display device as claimed in claim 20 is characterized in that, this touch-screen and this display device are provided with at interval or this touch-screen is integrated on this display device.
24. display device as claimed in claim 23, it is characterized in that, this display device further comprises a passivation layer and a screen layer, described screen layer is arranged on the lower surface of described touch-screen second matrix, this passivation layer is arranged on the surface of described screen layer, and this screen layer is provided with the surface of passivation layer away from described touch-screen second matrix, and the material of this passivation layer is silicon nitride or monox.
CN2007103058288A 2007-12-21 2007-12-27 Touch screen and display equipment Active CN101470565B (en)

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US12/286,153 US8325145B2 (en) 2007-12-27 2008-09-29 Touch panel and display device using the same
JP2008317371A JP4695180B2 (en) 2007-12-27 2008-12-12 Touch panel and display using the same
EP08254027A EP2073109A3 (en) 2007-12-21 2008-12-17 Touch panel and display device using the same
KR1020080130290A KR101210747B1 (en) 2007-12-21 2008-12-19 Touch panel and display device using the same

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